1935 - Hixon, E. The more important insect pests during 1932-1934. Okla. Agr. Expt. 

 Sta. Rpt. p. 256-259. 



Among pests of cotton in Oklahoma, Anthonomus grandis Boh. was kept in 

 check by dry weather, Heliothis obsoleta F. was more prevalent on cotton, and 

 Aphis gossypii Glov. caused serious injury when the crop was grown near 

 cowpeas or okra (Hibiscus esculentus). 



1942 - Webb, J. L,. Cotton or boll weevils. U. S. D. A. Misc. Pub. 484, 16 p. Super- 

 cedes Misc. Pub. 35. 



A popular account of the boll weevil which includes its description and de- 

 velopment, hibernation, injury to the crop, origin and spread, natural control, 

 and means of controlling the pest. 



1945 - Cavendish, R. A. E. Plantation pest. Fauna 7(2):48-49. 



Contains photographs of the developing boll weevil adult within the boll. 



1949 - Davis, W. O. How Halifax growers get $5,000,000 more for cotton. Prog. 

 Farmer 4:130. Apr. 



In 1925, 70,000 acres of cotton were planted in Halifax County (Texas) 

 which made 58,000 bales and $5,500,000 income. By 1939 cotton acreage had 

 dropped to 30,000, production to 9,600 bales, and income to $500,000. This loss 

 was due directly to boll weevil damage. 



Something had to be done. In 1940 the "Halifax County Production and Boll 

 Weevil Control Program" was established. A group of cotton farmers met at the 

 county agent's office to discuss the problem. The group selected a county cotton 

 committee composed of 5 farmers, 1 cotton ginner, 1 farm banker, 1 fertilizer 

 dealer, and 1 farm merchant. This committee, with the help of the county agent 

 and a State College extension cotton specialist, and a State College extension 

 entomologist drew up a long-term "Halifax County Cotton Program." 



I960 - Knipling, E. F. Use of insects for their own destruction. J. Econ. Ent. 53(3):415- 

 420. 



Theoretical calculations to show that a low-level mortality which is constant 

 and superimposed on mortality produced by normal environmental resistance can 

 in time lead to a greatly reduced population. The importance of applying control 

 measures against the total population, rather than against segments of the popula- 

 tion is pointed out. 



190 



